<?php // $Id: view_structure_sql.class.php,v 1.5 2007/10/10 05:25:31 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This class will show the SQL generated for the selected RDBMS for
/// the entire XMLDB file

class view_structure_sql extends XMLDBAction {

	/**
	 * Init method, every subclass will have its own
	 */
	function init() {
		parent::init();

	/// Set own custom attributes

	/// Get needed strings
		$this->loadStrings(array(
			'selectdb' => 'xmldb',
			'back' => 'xmldb'
		));
	}

	/**
	 * Invoke method, every class will have its own
	 * returns true/false on completion, setting both
	 * errormsg and output as necessary
	 */
	function invoke() {
		parent::invoke();

		$result = true;

	/// Set own core attributes
		$this->does_generate = ACTION_GENERATE_HTML;

	/// These are always here
		global $CFG, $XMLDB;

	/// Do the job, setting result as needed
	/// Get the dir containing the file
		$dirpath = required_param('dir', PARAM_PATH);
		$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);

	/// Get the correct dirs
		if (!empty($XMLDB->dbdirs)) {
			$dbdir =& $XMLDB->dbdirs[$dirpath];
		} else {
			return false;
		}
		if (!empty($XMLDB->editeddirs)) {
			$editeddir =& $XMLDB->editeddirs[$dirpath];
			$structure =& $editeddir->xml_file->getStructure();
		}
	/// ADD YOUR CODE HERE

	/// Get parameters
		$generatorparam = optional_param('generator', null, PARAM_ALPHANUM);
		if (empty($generatorparam)) {
			$generatorparam = $CFG->dbtype;
		}

	/// Calculate list of available SQL generators
		$plugins = get_list_of_plugins('lib/xmldb/classes/generators');
		$generators = array();
		foreach($plugins as $plugin) {
			$generators[$plugin] = $plugin;
		}
	/// Check we have the selected generator
		if (!in_array($generatorparam, $generators)) {
			$generatorparam = reset($generators);
		}

		/// The back to edit table button
		$b = ' <p class="centerpara buttons">';
		$b .= '<a href="index.php?action=edit_xml_file&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a>';
		$b .= '</p>';
		$o = $b;

		$o.= '	<table id="formelements" class="boxaligncenter" cellpadding="5">';
		$o.= '	  <tr><td align="center">' . $this->str['selectdb'];

	/// Show the popup of generators
		$url = 'index.php?action=view_structure_sql&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '&amp;generator=';
		$o.= popup_form($url, $generators, 'selectgenerator', $generatorparam, '', '', '' , true);
		$o.= '	  </td></tr>';
		$o.= '	  <tr><td><textarea cols="80" rows="32">';
	/// Get an array of statements
		if ($starr = $structure->getCreateStructureSQL($generatorparam, $CFG->prefix)) {
			$sqltext = '';
			foreach ($starr as $st) {
				$sqltext .= s($st) . "\n\n";
			}
			$sqltext = trim($sqltext);
			$o.= $sqltext;
		}
		$o.= '</textarea></td></tr>';
		$o.= '	</table>';

		$this->output = $o;

	/// Launch postaction if exists (leave this here!)
		if ($this->getPostAction() && $result) {
			return $this->launch($this->getPostAction());
		}

	/// Return ok if arrived here
		return $result;
	}
}
?>
